Metal-metal interactions in thallium(I)/platinum(II) compounds involving a chelating dicarbene and various auxiliary ligands

摘要

Reaction of (TlNO3)-N-l and (C4H10N4)Pt-ll(mnt) or (C4H10N4)Pt-ll(dmg-H) mnt = maleonitriledithiolate, dmg-H = dimethylglyoximate dianion in dilute, aqueous KOH yielded adducts of Tl-l and the conjugate bases of the platinum(11) compounds. The compound Tl-l(C4H9N4)Pt-ll(dmg-H)center dot 5H(2)O forms as dimers with close Tl(l)center dot center dot center dot Pt-ll separations of 3.0843(5) angstrom, while Tl-l(C4H9N4)Pt-ll(mnt) has much longer Tl(l)center dot center dot center dot Pt-ll separations of 3.4400(2) angstrom and forms loosely associated, helical coordination polymers. The new compounds are compared with the red and yellow polymorphs of Tl-l(C4H9N4)Pt-11(CN)(2), and the influences of crystal packing forces, Coulombic interactions, and hydrogen bonding on supramolecular structures and Tl(l)center dot center dot center dot Pt-ll separations are discussed.